What are the 4 types of ladders?

• A. Step, extension, straight, pole.
• B. Rope ladder, step ladder, extension ladder, stair ladder.
• C. A-frame, ladder, step stool, scaffold.
• D. Pole ladder, extension ladder, curved ladder, straight ladder.

Answer: (A)

Ladders come in four main portable forms, each with a distinct way they stand or work. A step ladder is self-supporting and forms an A-frame, so it can stand on its own without leaning on a wall or structure. An extension ladder is made of two or more sections that slide to lengthen the ladder, letting you reach higher areas when you have solid support at the top. A straight ladder, or single ladder, is a long, non-self-supporting type that must be leaned against a stable surface to stay upright. A pole ladder uses two long poles connected by rungs and isn’t self-supporting, typically used in narrower spaces or specific situations where conventional ladders won’t fit.

The other options mix in ladder forms that aren’t the standard portable categories used for general tasks, such as rope ladders or stair ladders, and scaffolds, which are different kinds of access equipment.